Wifi信號危險嗎？

Wi-Fi signals use very low intensity radio waves. Whilst similar in wavelength to domesticmicrowave radiation， the intensity of Wi-Fi radiation is 100，000 times less than that of a domesticmicrowave oven.

Wifi信號運用的是強度非常低的無線電波，其波長與家用微波輻射相似，而其強度則比家用微波爐要弱10萬倍。

The type of radiation emitted by radio waves （Wi-Fi）， visible light， microwaves and mobilephones has been shown to raise the temperature of tissue at very high levels of exposure. This is called a thermal interaction， but researchers are divided as to whether the radiation we receivedaily can cause damage.

由無線電波（如Wifi）、可見光、微波和手機發出的輻射，在長時間照射下會使物體溫度升高。這被稱作熱互作用，但針對這種輻射是否會對人體產生危害，調查者們持不同意見。

The UK Health Protection Agency （HPA） has been monitoring the safety of Wi-Fi. It says people using Wi-Fi， or those in the proximity， are exposed to the radio signals it emits-and some of the transmitted energy in the signals is absorbed in their bodies.

英國健康保護署曾檢測Wifi的安全性。它的調查結果稱，使用或者接近Wifi的人群都在其輻射范圍內，而且信號中傳送的一些能量會被吸取進身體中。

However， the signals are very low power. Sitting in a Wi-Fi hotspot for a year results inreceiving the same dose of radio waves as making a 20 minute mobile phone call.

然而，這些信號的能量很低。在Wifi熱點附近坐上一年所吸取的輻射，大約等于20分鐘通話所產生的無線電波。